Possible Evidence for a Fall in the Prevalence of High-Functioning Pervasive Developmental Disorder with Age?

Table 4

Distribution of males with possible or definite diagnosis of HFPDD by age.

Age group	AQ =26–31and no clinical diagnosis	AQ ≤ 32 and previous clinical diagnosis	AQ ≥ 32 and previous clinical diagnosis	AQ ≥ 32 and no previous clinical diagnosis	Total included with likely or confirmed ASD
13 to 14	2	5	4	1	12
15–19	1	10	11	4	28
20–24	3	1	2	2	8
25–29		3	2	2	7
30–34		3	8	3	14
35–39	1	1	1	1	4
40–44	3		2	1	6
45–49			2	3	5
50–54	1				1
55–59	1				1
60 and over			1		1